Furnace.



J. H. KOONS.

y FURNAGE.

APPLICATION I'ILED FEB. 5, 1910.

Patented Jan.3,1911.

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IURNAUE.

APPLIoATIoN FILED rims, 1910.

Patented Jan.3, 1911.

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u z'o JOHN H. KOONS, 0F ANDERSON, INDANA.

FURNAC.

Specication of Letters Patent.

Patented Jan. l3, 1911.

Application led February 5, 1910. Serial No. 542,199.

To all whom it may concern:

Be it known that I, JOHN H. KooNs, a citizen of the United States, residing at Anderson, in the county of Madison and State of Indiana, have invented a new and useful Furnace, of which the following is a specification.

This invention relates to furnaces for heating met-al for forging andfor casting, and the object of my improvements is to provide means whereby the maximum efficiency of the fuel is obtained.

In the accompanying drawings, Figure 1 is an elevation of a melting furnace. Fig. 2 is a cross-section on the line 2-2 of Fig. 1. Fig. 3 is a cross-section on the line 3-3 of Fig. 1. Fig. 4 is a side elevat-ion of a furnace for heating metal for forging. Fig. 5 is a cross section on the line 5-5fof Fig. 4. Fig. 6 is a central cross section of a burner. Fig. 7 is a cross section on the line 7--.7 of Fig. 6. Fig. 8 is a cross sectional detail of an air pipe. Fig. `9 is a cross section on the line 9 9 of Fig. 6. Fig. 10 is a detail of the burner valve.

Similar reference characters referto like parts throughout the several views.

My invention can be embodied in furnaces of any desired type, but only two styles are shown. One is a cylindrical open-top melting furnace `and theotheris a rectangular open-front furnace adapted to heat iron andv steel for forging purposes. It will be understood'however that the form and dimensions of the heating-chambenforms no part yof' this present invention.

Referring now to Figs'. 1, 2 and 3 which show a furnace having a heating-chamber especially adapted for melt-ing brass in crucibles, 1 is a hollow base having an upwardly extending flange 2. A bottom 3 and body 4 of fire-brlckor other refractory maair-blast pipes 9 extending to the burners.

As part -of the internal heat will be communicated to the base, the air within the base will become heated, so that this heat will not be lost. The fuel-oil is fed to the 'burners through the pipe 10, and this may by the valve 42.

. connect to the pipe 11 passin through the base whereby the oil will also e heated.

The air which has been heated in the base leaves it through pipes 9 having flanges 14 connecting to the flanges 15 on thel base. These pipes also connect to the fianges 16 of the burner body by means of a flange 17. Between these anges'l and 17 are slidable the .gates 18 which lmay be locked in any desired position, to control the amount of air admitted, by means of the screws 19. See Fig. 8. A

Figs. 6 to 10 inclusive show` details of the burner. The, elbow shaped body 20 has thc flanges 16 and 21 at its ends. .Near the flange 21 are openings 22,- more clearly shown in Figs. 2 and 4, separated by the bridge-pieces 23. Additional air may be drawn in through these openings as is usual in the well known Bunsen burner of which this is a type. The amount of air drawn `in is regulated by the adjustable sleeve 24, screwed into a ring 25 in the burner body adjacent the openings 22. The bore of this sleeve is tapering toV increase the speed of the air as it passes the oil-discharge opening.

A boss-27 on -thebody 20 of the vburner is threaded 'to receive .the bushing 28, in which is mounted the oil-feed pipe 29. At the inner end of this pipe-.is secured a nozzlel 30 having Aa discharge opening 31 and a trough-shaped guide 32 which is adapted to cause the' spray of fuel oil to assume the shape Aof a fan. The pipe 29 maybe properly'adjusted bymeans of the screws 33. A fitting 34 is mounted on the outer end of the pipev 29 and is capped by the threaded bearing 35 having a stuffing box and gland 36 at its outer end. The valve rod 37 is mounted .in this bearing and has a hand wheel 38 at lts outer end and a screw threaded enlargement or valve 39 at its inner end. The fuel pipe 10 connects to one side of the fitting 34- while to the opposite side an air or steam pipe 41 may be connected. The pressure ofA the air or steam entering through the pipe A 41 should Vbe practically the same as that of the fuel, and the anount )may be controlled Fig. 4

If desired, two burners may be employed, as shown in Figs. 1,2 and 3, and these may be placed at any desired helght from the bottom of the heating chamber. When at the same hei t, .as shown in these drawings, the blasts o incandescent gas from these ed wherever desire burners connected to the back and one side,

burners will meet at the rear of the chamber and be broken up in smaller4 eddies, filling ythe chamber with intense heat.

The operation of this furnace is as follows z-The oil having been turned on and ignited, lthe blower or fan is started and a blast of air passes up the pipe 9 into the burner body 20 and out through the nozzlesleeve 24, throwing the jet of burning oil into the furnace, the amount of fuel oil being controlled by the hand wheel 38; At the beginning, a small portion of unconsumed fuel oil often falls to the bottom of the heating chamber andsinks through. By forming the rin 2 on the top of the base this oil is prevente from flowing' out over the edge of the base, and is held where it will be evaporated later on and be burned in the heating chamber. While the iange 2 may be positioned wherever desired I prefer to place the same midway of the thickness of the wall of the body 4. The nozzle-sleeve 24 will be adjusted until the proper amount of air is drawn into the heating chamber through the openings 2 2. The fuel-oil will be given a rotary motion as it emerges from the` opening 31 by the spiral 39 causing it to hold up until flattened by the trough 32. When air or steam-is introduced' into the pipe 29 through the pi e 41, the fuel is caused to emerge in the fbrm of a finer spray, being first thoroughly agitated. I

Referring -to Figs. 4 and 5, a furnace there ,shown has. a hollow rectangularl base 51 formed with an upwardly extending {iange 52. The air intake ipe 53 may be connectdi.) The furnace proper is shown in the form of a muflle 54 with ing witnesses.

although either may be omitted and the height and positions may be changed'as required. To cause the blast of flame to enter the heatin chamber at an upward inclination, a sma 1 block 55 (Fig. 4) may be placed in the intake openings. The operatlon of this type of furnace 1s the same as that of the melting furnace previously described.

Many changes may be made in the details of the construction of the various parts without departing from the spirit of my invention. V

Havin now explained my construction, what I c aim, as my invention and desire to secure by Letters Patent is l. In a furnace, the combination of a hollow base and a shell forming the heating chamber, a refractory lining for the same a pipe for conducting air to the interior of the base, a pipe extending from said base to an opening 1n the shell, a Bunsen burner in saidpipe adjacent the shell, and an u wardly extending iiange formed on the base and extending into the refractory linm In a furnace, the combination of base, a shell extending upward from the same, a refractor lining for said shell forming a heating c amber, a ange extending upward from said 'base into said refractory ming, and a Bunsen burner extending into an opening in said heating chamber.

In testimony whereof I have signed this specication in the presence of two subscrib- JOHN H. KOONS. Witnesses GEORGE B. EPPnnsoN, Jol-m A. RUST. 

